--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/gst/playback/gstinputselector.c Tue Aug 31 15:30:33 2010 +0300
@@ -0,0 +1,1433 @@
+/* GStreamer
+ * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
+ * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
+ * Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
+ * Copyright (C) 2007 Wim Taymans <wim.taymans@gmail.com>
+ * Copyright (C) 2007 Andy Wingo <wingo@pobox.com>
+ * Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:element-input-selector
+ * @see_also: #GstOutputSelector
+ *
+ * Direct one out of N input streams to the output pad.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+
+#include "gstinputselector.h"
+#include "gstplay-marshal.h"
+
+GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
+#define GST_CAT_DEFAULT input_selector_debug
+
+static const GstElementDetails gst_input_selector_details =
+GST_ELEMENT_DETAILS ("Input selector",
+ "Generic",
+ "N-to-1 input stream selectoring",
+ "Julien Moutte <julien@moutte.net>\n"
+ "Ronald S. Bultje <rbultje@ronald.bitfreak.net>\n"
+ "Jan Schmidt <thaytan@mad.scientist.com>\n"
+ "Wim Taymans <wim.taymans@gmail.com>");
+
+static GstStaticPadTemplate gst_input_selector_sink_factory =
+GST_STATIC_PAD_TEMPLATE ("sink%d",
+ GST_PAD_SINK,
+ GST_PAD_REQUEST,
+ GST_STATIC_CAPS_ANY);
+
+static GstStaticPadTemplate gst_input_selector_src_factory =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS_ANY);
+
+enum
+{
+ PROP_0,
+ PROP_N_PADS,
+ PROP_ACTIVE_PAD,
+ PROP_SELECT_ALL,
+ PROP_LAST
+};
+
+#define DEFAULT_PAD_ALWAYS_OK TRUE
+
+enum
+{
+ PROP_PAD_0,
+ PROP_PAD_RUNNING_TIME,
+ PROP_PAD_TAGS,
+ PROP_PAD_ACTIVE,
+ PROP_PAD_ALWAYS_OK,
+ PROP_PAD_LAST
+};
+
+enum
+{
+ /* methods */
+ SIGNAL_BLOCK,
+ SIGNAL_SWITCH,
+ LAST_SIGNAL
+};
+static guint gst_input_selector_signals[LAST_SIGNAL] = { 0 };
+
+static gboolean gst_input_selector_is_active_sinkpad (GstInputSelector * sel,
+ GstPad * pad);
+static GstPad *gst_input_selector_activate_sinkpad (GstInputSelector * sel,
+ GstPad * pad);
+static GstPad *gst_input_selector_get_linked_pad (GstPad * pad,
+ gboolean strict);
+static gboolean gst_input_selector_check_eos (GstElement * selector);
+
+#define GST_TYPE_SELECTOR_PAD \
+ (gst_selector_pad_get_type())
+#define GST_SELECTOR_PAD(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
+#define GST_SELECTOR_PAD_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
+#define GST_IS_SELECTOR_PAD(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
+#define GST_IS_SELECTOR_PAD_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
+#define GST_SELECTOR_PAD_CAST(obj) \
+ ((GstSelectorPad *)(obj))
+
+typedef struct _GstSelectorPad GstSelectorPad;
+typedef struct _GstSelectorPadClass GstSelectorPadClass;
+
+struct _GstSelectorPad
+{
+ GstPad parent;
+
+ gboolean active; /* when buffer have passed the pad */
+ gboolean eos; /* when EOS has been received */
+ gboolean discont; /* after switching we create a discont */
+ gboolean always_ok;
+ GstSegment segment; /* the current segment on the pad */
+ GstTagList *tags; /* last tags received on the pad */
+
+ gboolean segment_pending;
+};
+
+struct _GstSelectorPadClass
+{
+ GstPadClass parent;
+};
+
+static void gst_selector_pad_class_init (GstSelectorPadClass * klass);
+static void gst_selector_pad_init (GstSelectorPad * pad);
+static void gst_selector_pad_finalize (GObject * object);
+static void gst_selector_pad_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+static void gst_selector_pad_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+
+static GstPadClass *selector_pad_parent_class = NULL;
+
+static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
+static void gst_selector_pad_reset (GstSelectorPad * pad);
+static gboolean gst_selector_pad_event (GstPad * pad, GstEvent * event);
+static GstCaps *gst_selector_pad_getcaps (GstPad * pad);
+static GList *gst_selector_pad_get_linked_pads (GstPad * pad);
+static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstBuffer * buf);
+static GstFlowReturn gst_selector_pad_bufferalloc (GstPad * pad,
+ guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
+
+GType
+gst_selector_pad_get_type (void)
+{
+ static GType selector_pad_type = 0;
+
+ if (!selector_pad_type) {
+ static const GTypeInfo selector_pad_info = {
+ sizeof (GstSelectorPadClass),
+ NULL,
+ NULL,
+ (GClassInitFunc) gst_selector_pad_class_init,
+ NULL,
+ NULL,
+ sizeof (GstSelectorPad),
+ 0,
+ (GInstanceInitFunc) gst_selector_pad_init,
+ };
+
+ selector_pad_type =
+ g_type_register_static (GST_TYPE_PAD, "GstPlaybin2SelectorPad",
+ &selector_pad_info, 0);
+ }
+ return selector_pad_type;
+}
+
+static void
+gst_selector_pad_class_init (GstSelectorPadClass * klass)
+{
+ GObjectClass *gobject_class;
+
+ gobject_class = (GObjectClass *) klass;
+
+ selector_pad_parent_class = g_type_class_peek_parent (klass);
+
+ gobject_class->finalize = gst_selector_pad_finalize;
+
+ gobject_class->get_property =
+ GST_DEBUG_FUNCPTR (gst_selector_pad_get_property);
+ gobject_class->set_property =
+ GST_DEBUG_FUNCPTR (gst_selector_pad_set_property);
+
+ g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
+ g_param_spec_int64 ("running-time", "Running time",
+ "Running time of stream on pad", 0, G_MAXINT64, 0, G_PARAM_READABLE));
+ g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
+ g_param_spec_boxed ("tags", "Tags",
+ "The currently active tags on the pad", GST_TYPE_TAG_LIST,
+ G_PARAM_READABLE));
+ g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
+ g_param_spec_boolean ("active", "Active",
+ "If the pad is currently active", FALSE, G_PARAM_READABLE));
+ g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
+ g_param_spec_boolean ("always-ok", "Always OK",
+ "Make an inactive pad return OK instead of NOT_LINKED",
+ DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE));
+}
+
+static void
+gst_selector_pad_init (GstSelectorPad * pad)
+{
+ pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
+ gst_selector_pad_reset (pad);
+}
+
+static void
+gst_selector_pad_finalize (GObject * object)
+{
+ GstSelectorPad *pad;
+
+ pad = GST_SELECTOR_PAD_CAST (object);
+
+ if (pad->tags)
+ gst_tag_list_free (pad->tags);
+
+ G_OBJECT_CLASS (selector_pad_parent_class)->finalize (object);
+}
+
+static void
+gst_selector_pad_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
+
+ switch (prop_id) {
+ case PROP_PAD_ALWAYS_OK:
+ GST_OBJECT_LOCK (object);
+ spad->always_ok = g_value_get_boolean (value);
+ GST_OBJECT_UNLOCK (object);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_selector_pad_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
+
+ switch (prop_id) {
+ case PROP_PAD_RUNNING_TIME:
+ g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
+ break;
+ case PROP_PAD_TAGS:
+ GST_OBJECT_LOCK (object);
+ g_value_set_boxed (value, spad->tags);
+ GST_OBJECT_UNLOCK (object);
+ break;
+ case PROP_PAD_ACTIVE:
+ {
+ GstInputSelector *sel;
+
+ sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
+ g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
+ GST_PAD_CAST (spad)));
+ gst_object_unref (sel);
+ break;
+ }
+ case PROP_PAD_ALWAYS_OK:
+ GST_OBJECT_LOCK (object);
+ g_value_set_boolean (value, spad->always_ok);
+ GST_OBJECT_UNLOCK (object);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static gint64
+gst_selector_pad_get_running_time (GstSelectorPad * pad)
+{
+ gint64 ret = 0;
+
+ GST_OBJECT_LOCK (pad);
+ if (pad->active) {
+ gint64 last_stop = pad->segment.last_stop;
+
+ if (last_stop >= 0)
+ ret = gst_segment_to_running_time (&pad->segment, GST_FORMAT_TIME,
+ last_stop);
+ }
+ GST_OBJECT_UNLOCK (pad);
+
+ GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (ret));
+
+ return ret;
+}
+
+static void
+gst_selector_pad_reset (GstSelectorPad * pad)
+{
+ GST_OBJECT_LOCK (pad);
+ pad->active = FALSE;
+ pad->eos = FALSE;
+ pad->segment_pending = FALSE;
+ pad->discont = FALSE;
+ gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
+ GST_OBJECT_UNLOCK (pad);
+}
+
+/* strictly get the linked pad from the sinkpad. If the pad is active we return
+ * the srcpad else we return NULL */
+static GList *
+gst_selector_pad_get_linked_pads (GstPad * pad)
+{
+ GstPad *otherpad;
+
+ otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
+ if (!otherpad)
+ return NULL;
+
+ /* need to drop the ref, internal linked pads is not MT safe */
+ gst_object_unref (otherpad);
+
+ return g_list_append (NULL, otherpad);
+}
+
+static gboolean
+gst_selector_pad_event (GstPad * pad, GstEvent * event)
+{
+ gboolean res = TRUE;
+ gboolean forward = TRUE;
+ GstInputSelector *sel;
+ GstSelectorPad *selpad;
+ GstPad *prev_active_sinkpad;
+ GstPad *active_sinkpad;
+
+ sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
+ selpad = GST_SELECTOR_PAD_CAST (pad);
+
+ GST_INPUT_SELECTOR_LOCK (sel);
+ prev_active_sinkpad = sel->active_sinkpad;
+ active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
+
+ /* only forward if we are dealing with the active sinkpad or if select_all
+ * is enabled */
+ if (pad != active_sinkpad && !sel->select_all)
+ forward = FALSE;
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+
+ if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
+ g_object_notify (G_OBJECT (sel), "active-pad");
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_FLUSH_START:
+ /* FIXME, flush out the waiter */
+ break;
+ case GST_EVENT_FLUSH_STOP:
+ GST_INPUT_SELECTOR_LOCK (sel);
+ gst_selector_pad_reset (selpad);
+ sel->pending_close = FALSE;
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+ break;
+ case GST_EVENT_NEWSEGMENT:
+ {
+ gboolean update;
+ GstFormat format;
+ gdouble rate, arate;
+ gint64 start, stop, time;
+
+ gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
+ &start, &stop, &time);
+
+ GST_DEBUG_OBJECT (pad,
+ "configured NEWSEGMENT update %d, rate %lf, applied rate %lf, "
+ "format %d, "
+ "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
+ G_GINT64_FORMAT, update, rate, arate, format, start, stop, time);
+
+ GST_INPUT_SELECTOR_LOCK (sel);
+ GST_OBJECT_LOCK (selpad);
+ gst_segment_set_newsegment_full (&selpad->segment, update,
+ rate, arate, format, start, stop, time);
+ GST_OBJECT_UNLOCK (selpad);
+
+ /* If we aren't forwarding the event (because the pad is not the
+ * active_sinkpad, and select_all is not set, then set the flag on the
+ * that says a segment needs sending if/when that pad is activated.
+ * For all other cases, we send the event immediately, which makes
+ * sparse streams and other segment updates work correctly downstream.
+ */
+ if (!forward)
+ selpad->segment_pending = TRUE;
+
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+ break;
+ }
+ case GST_EVENT_TAG:
+ {
+ GstTagList *tags, *oldtags, *newtags;
+
+ gst_event_parse_tag (event, &tags);
+
+ GST_OBJECT_LOCK (selpad);
+ oldtags = selpad->tags;
+
+ newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
+ selpad->tags = newtags;
+ if (oldtags)
+ gst_tag_list_free (oldtags);
+ GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
+ GST_OBJECT_UNLOCK (selpad);
+
+ g_object_notify (G_OBJECT (selpad), "tags");
+ break;
+ }
+ case GST_EVENT_EOS:
+ selpad->eos = TRUE;
+ GST_DEBUG_OBJECT (pad, "received EOS");
+ /* don't forward eos in select_all mode until all sink pads have eos */
+ if (sel->select_all && !gst_input_selector_check_eos (GST_ELEMENT (sel))) {
+ forward = FALSE;
+ }
+ break;
+ default:
+ break;
+ }
+ if (forward) {
+ GST_DEBUG_OBJECT (pad, "forwarding event");
+ res = gst_pad_push_event (sel->srcpad, event);
+ } else
+ gst_event_unref (event);
+
+ gst_object_unref (sel);
+
+ return res;
+}
+
+static GstCaps *
+gst_selector_pad_getcaps (GstPad * pad)
+{
+ GstInputSelector *sel;
+ GstCaps *caps;
+
+ sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
+
+ GST_DEBUG_OBJECT (sel, "Getting caps of srcpad peer");
+ caps = gst_pad_peer_get_caps (sel->srcpad);
+ if (caps == NULL)
+ caps = gst_caps_new_any ();
+
+ gst_object_unref (sel);
+
+ return caps;
+}
+
+static GstFlowReturn
+gst_selector_pad_bufferalloc (GstPad * pad, guint64 offset,
+ guint size, GstCaps * caps, GstBuffer ** buf)
+{
+ GstInputSelector *sel;
+ GstFlowReturn result;
+ GstPad *active_sinkpad;
+ GstPad *prev_active_sinkpad;
+ GstSelectorPad *selpad;
+
+ sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
+ selpad = GST_SELECTOR_PAD_CAST (pad);
+
+ GST_DEBUG_OBJECT (pad, "received alloc");
+
+ GST_INPUT_SELECTOR_LOCK (sel);
+ prev_active_sinkpad = sel->active_sinkpad;
+ active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
+
+ if (pad != active_sinkpad)
+ goto not_active;
+
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+
+ if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
+ g_object_notify (G_OBJECT (sel), "active-pad");
+
+ result = gst_pad_alloc_buffer (sel->srcpad, offset, size, caps, buf);
+
+done:
+ gst_object_unref (sel);
+
+ return result;
+
+ /* ERRORS */
+not_active:
+ {
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+
+ /* unselected pad, perform fallback alloc or return unlinked when
+ * asked */
+ GST_OBJECT_LOCK (selpad);
+ if (selpad->always_ok) {
+ GST_DEBUG_OBJECT (pad, "Not selected, performing fallback allocation");
+ *buf = NULL;
+ result = GST_FLOW_OK;
+ } else {
+ GST_DEBUG_OBJECT (pad, "Not selected, return NOT_LINKED");
+ result = GST_FLOW_NOT_LINKED;
+ }
+ GST_OBJECT_UNLOCK (selpad);
+
+ goto done;
+ }
+}
+
+/* must be called with the SELECTOR_LOCK, will block while the pad is blocked
+ * or return TRUE when flushing */
+static gboolean
+gst_input_selector_wait (GstInputSelector * self, GstPad * pad)
+{
+ while (self->blocked && !self->flushing) {
+ /* we can be unlocked here when we are shutting down (flushing) or when we
+ * get unblocked */
+ GST_INPUT_SELECTOR_WAIT (self);
+ }
+ return self->flushing;
+}
+
+static GstFlowReturn
+gst_selector_pad_chain (GstPad * pad, GstBuffer * buf)
+{
+ GstInputSelector *sel;
+ GstFlowReturn res;
+ GstPad *active_sinkpad;
+ GstPad *prev_active_sinkpad;
+ GstSelectorPad *selpad;
+ GstClockTime end_time, duration;
+ GstSegment *seg;
+ GstEvent *close_event = NULL, *start_event = NULL;
+
+ sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
+ selpad = GST_SELECTOR_PAD_CAST (pad);
+ seg = &selpad->segment;
+
+ GST_INPUT_SELECTOR_LOCK (sel);
+ /* wait or check for flushing */
+ if (gst_input_selector_wait (sel, pad))
+ goto flushing;
+
+ GST_DEBUG_OBJECT (pad, "getting active pad");
+
+ prev_active_sinkpad = sel->active_sinkpad;
+ active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
+
+ /* update the segment on the srcpad */
+ end_time = GST_BUFFER_TIMESTAMP (buf);
+ if (GST_CLOCK_TIME_IS_VALID (end_time)) {
+ duration = GST_BUFFER_DURATION (buf);
+ if (GST_CLOCK_TIME_IS_VALID (duration))
+ end_time += duration;
+ GST_DEBUG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (end_time));
+
+ GST_OBJECT_LOCK (pad);
+ gst_segment_set_last_stop (seg, seg->format, end_time);
+ GST_OBJECT_UNLOCK (pad);
+ }
+
+ /* Ignore buffers from pads except the selected one */
+ if (pad != active_sinkpad)
+ goto ignore;
+
+ if (G_UNLIKELY (sel->pending_close)) {
+ GstSegment *cseg = &sel->segment;
+
+ GST_DEBUG_OBJECT (sel,
+ "pushing NEWSEGMENT update %d, rate %lf, applied rate %lf, "
+ "format %d, "
+ "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
+ G_GINT64_FORMAT, TRUE, cseg->rate, cseg->applied_rate, cseg->format,
+ cseg->start, cseg->stop, cseg->time);
+
+ /* create update segment */
+ close_event = gst_event_new_new_segment_full (TRUE, cseg->rate,
+ cseg->applied_rate, cseg->format, cseg->start, cseg->stop, cseg->time);
+
+ sel->pending_close = FALSE;
+ }
+ /* if we have a pending segment, push it out now */
+ if (G_UNLIKELY (selpad->segment_pending)) {
+ GST_DEBUG_OBJECT (pad,
+ "pushing NEWSEGMENT update %d, rate %lf, applied rate %lf, "
+ "format %d, "
+ "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
+ G_GINT64_FORMAT, FALSE, seg->rate, seg->applied_rate, seg->format,
+ seg->start, seg->stop, seg->time);
+
+ start_event = gst_event_new_new_segment_full (FALSE, seg->rate,
+ seg->applied_rate, seg->format, seg->start, seg->stop, seg->time);
+
+ selpad->segment_pending = FALSE;
+ }
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+
+ if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
+ g_object_notify (G_OBJECT (sel), "active-pad");
+
+ if (close_event)
+ gst_pad_push_event (sel->srcpad, close_event);
+
+ if (start_event)
+ gst_pad_push_event (sel->srcpad, start_event);
+
+ if (selpad->discont) {
+ buf = gst_buffer_make_metadata_writable (buf);
+
+ GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
+ GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
+ selpad->discont = FALSE;
+ }
+
+ /* forward */
+ GST_DEBUG_OBJECT (pad, "Forwarding buffer %p from pad %s:%s", buf,
+ GST_DEBUG_PAD_NAME (pad));
+
+ res = gst_pad_push (sel->srcpad, buf);
+
+done:
+ gst_object_unref (sel);
+ return res;
+
+ /* dropped buffers */
+ignore:
+ {
+ GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
+ /* when we drop a buffer, we're creating a discont on this pad */
+ selpad->discont = TRUE;
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+ gst_buffer_unref (buf);
+
+ /* figure out what to return upstream */
+ GST_OBJECT_LOCK (selpad);
+ if (selpad->always_ok)
+ res = GST_FLOW_OK;
+ else
+ res = GST_FLOW_NOT_LINKED;
+ GST_OBJECT_UNLOCK (selpad);
+
+ goto done;
+ }
+flushing:
+ {
+ GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+ gst_buffer_unref (buf);
+ res = GST_FLOW_WRONG_STATE;
+ goto done;
+ }
+}
+
+static void gst_input_selector_init (GstInputSelector * sel);
+static void gst_input_selector_base_init (GstInputSelectorClass * klass);
+static void gst_input_selector_class_init (GstInputSelectorClass * klass);
+
+static void gst_input_selector_dispose (GObject * object);
+
+static void gst_input_selector_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_input_selector_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+
+static GstPad *gst_input_selector_request_new_pad (GstElement * element,
+ GstPadTemplate * templ, const gchar * unused);
+static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
+
+static GstStateChangeReturn gst_input_selector_change_state (GstElement *
+ element, GstStateChange transition);
+
+static GstCaps *gst_input_selector_getcaps (GstPad * pad);
+static gboolean gst_input_selector_event (GstPad * pad, GstEvent * event);
+static gboolean gst_input_selector_query (GstPad * pad, GstQuery * query);
+static gint64 gst_input_selector_block (GstInputSelector * self);
+static void gst_input_selector_switch (GstInputSelector * self,
+ GstPad * pad, gint64 stop_time, gint64 start_time);
+
+static GstElementClass *parent_class = NULL;
+
+GType
+gst_input_selector_get_type (void)
+{
+ static GType input_selector_type = 0;
+
+ if (!input_selector_type) {
+ static const GTypeInfo input_selector_info = {
+ sizeof (GstInputSelectorClass),
+ (GBaseInitFunc) gst_input_selector_base_init,
+ NULL,
+ (GClassInitFunc) gst_input_selector_class_init,
+ NULL,
+ NULL,
+ sizeof (GstInputSelector),
+ 0,
+ (GInstanceInitFunc) gst_input_selector_init,
+ };
+ input_selector_type =
+ g_type_register_static (GST_TYPE_ELEMENT,
+ "GstPlaybin2InputSelector", &input_selector_info, 0);
+ GST_DEBUG_CATEGORY_INIT (input_selector_debug,
+ "playbin2-input-selector", 0, "Playbin2 input stream selector element");
+ }
+
+ return input_selector_type;
+}
+
+static void
+gst_input_selector_base_init (GstInputSelectorClass * klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_set_details (element_class, &gst_input_selector_details);
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_input_selector_sink_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_input_selector_src_factory));
+}
+
+static void
+gst_input_selector_class_init (GstInputSelectorClass * klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ gobject_class->dispose = gst_input_selector_dispose;
+
+ gobject_class->set_property =
+ GST_DEBUG_FUNCPTR (gst_input_selector_set_property);
+ gobject_class->get_property =
+ GST_DEBUG_FUNCPTR (gst_input_selector_get_property);
+
+ g_object_class_install_property (gobject_class, PROP_N_PADS,
+ g_param_spec_uint ("n-pads", "Number of Pads",
+ "The number of sink pads", 0, G_MAXUINT, 0, G_PARAM_READABLE));
+
+ g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
+ g_param_spec_object ("active-pad", "Active pad",
+ "The currently active sink pad", GST_TYPE_PAD, G_PARAM_READWRITE));
+
+ g_object_class_install_property (gobject_class, PROP_SELECT_ALL,
+ g_param_spec_boolean ("select-all", "Select all mode",
+ "Forwards data from all input pads", FALSE, G_PARAM_READWRITE));
+
+ /**
+ * GstInputSelector::block:
+ * @inputselector: the #GstInputSelector
+ *
+ * Block all sink pads in preparation for a switch. Returns the stop time of
+ * the current switch segment, as a running time, or 0 if there is no current
+ * active pad or the current active pad never received data.
+ */
+ gst_input_selector_signals[SIGNAL_BLOCK] =
+ g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+ G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
+ gst_play_marshal_INT64__VOID, G_TYPE_INT64, 0);
+ /**
+ * GstInputSelector::switch:
+ * @inputselector: the #GstInputSelector
+ * @pad: the pad to switch to
+ * @stop_time: running time at which to close the previous segment, or -1
+ * to use the running time of the previously active sink pad
+ * @start_time: running time at which to start the new segment, or -1 to
+ * use the running time of the newly active sink pad
+ *
+ * Switch to a new feed. The segment opened by the previously active pad, if
+ * any, will be closed, and a new segment opened before data flows again.
+ *
+ * This signal must be emitted when the element has been blocked via the <link
+ * linkend="GstInputSelector-block">block</link> signal.
+ *
+ * If you have a stream with only one switch element, such as an audio-only
+ * stream, a stream switch should be performed by first emitting the block
+ * signal, and then emitting the switch signal with -1 for the stop and start
+ * time values.
+ *
+ * The intention of the @stop_time and @start_time arguments is to allow
+ * multiple switch elements to switch and maintain stream synchronization.
+ * When switching a stream with multiple feeds, you will need as many switch
+ * elements as you have feeds. For example, a feed with audio and video will
+ * have one switch element between the audio feeds and one for video.
+ *
+ * A switch over multiple switch elements should be performed as follows:
+ * First, emit the <link linkend="GstInputSelector-block">block</link>
+ * signal, collecting the returned values. The maximum running time returned
+ * by block should then be used as the time at which to close the previous
+ * segment.
+ *
+ * Then, query the running times of the new audio and video pads that you will
+ * switch to. Naturally, these pads are on separate switch elements. Take the
+ * minimum running time for those streams and use it for the time at which to
+ * open the new segment.
+ *
+ * If @pad is the same as the current active pad, the element will cancel any
+ * previous block without adjusting segments.
+ *
+ * <note><simpara>
+ * the signal changed from accepting the pad name to the pad object.
+ * </simpara></note>
+ *
+ * Since: 0.10.7
+ */
+ gst_input_selector_signals[SIGNAL_SWITCH] =
+ g_signal_new ("switch", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GstInputSelectorClass, switch_),
+ NULL, NULL, gst_play_marshal_VOID__OBJECT_INT64_INT64,
+ G_TYPE_NONE, 3, GST_TYPE_PAD, G_TYPE_INT64, G_TYPE_INT64);
+
+ gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
+ gstelement_class->release_pad = gst_input_selector_release_pad;
+ gstelement_class->change_state = gst_input_selector_change_state;
+
+ klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
+ /* note the underscore because switch is a keyword otherwise */
+ klass->switch_ = GST_DEBUG_FUNCPTR (gst_input_selector_switch);
+}
+
+static void
+gst_input_selector_init (GstInputSelector * sel)
+{
+ sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
+ gst_pad_set_internal_link_function (sel->srcpad,
+ GST_DEBUG_FUNCPTR (gst_selector_pad_get_linked_pads));
+ gst_pad_set_getcaps_function (sel->srcpad,
+ GST_DEBUG_FUNCPTR (gst_input_selector_getcaps));
+ gst_pad_set_query_function (sel->srcpad,
+ GST_DEBUG_FUNCPTR (gst_input_selector_query));
+ gst_pad_set_event_function (sel->srcpad,
+ GST_DEBUG_FUNCPTR (gst_input_selector_event));
+ gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
+ /* sinkpad management */
+ sel->active_sinkpad = NULL;
+ sel->padcount = 0;
+ gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
+
+ sel->lock = g_mutex_new ();
+ sel->cond = g_cond_new ();
+ sel->blocked = FALSE;
+
+ sel->select_all = FALSE;
+}
+
+static void
+gst_input_selector_dispose (GObject * object)
+{
+ GstInputSelector *sel = GST_INPUT_SELECTOR (object);
+
+ if (sel->active_sinkpad) {
+ gst_object_unref (sel->active_sinkpad);
+ sel->active_sinkpad = NULL;
+ }
+ if (sel->lock) {
+ g_mutex_free (sel->lock);
+ sel->lock = NULL;
+ }
+ if (sel->cond) {
+ g_cond_free (sel->cond);
+ sel->cond = NULL;
+ }
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+/* Solve the following equation for B.timestamp, and set that as the segment
+ * stop:
+ * B.running_time = (B.timestamp - NS.start) / NS.abs_rate + NS.accum
+ */
+static gint64
+gst_segment_get_timestamp (GstSegment * segment, gint64 running_time)
+{
+ return (running_time - segment->accum) * segment->abs_rate + segment->start;
+}
+
+static void
+gst_segment_set_stop (GstSegment * segment, gint64 running_time)
+{
+ segment->stop = gst_segment_get_timestamp (segment, running_time);
+ segment->last_stop = -1;
+}
+
+static void
+gst_segment_set_start (GstSegment * segment, gint64 running_time)
+{
+ gint64 new_start, duration;
+
+ new_start = gst_segment_get_timestamp (segment, running_time);
+
+ /* this is the duration we skipped */
+ duration = new_start - segment->start;
+ /* add the duration to the accumulated segment time */
+ segment->accum += duration;
+ /* move position in the segment */
+ segment->time += duration;
+ segment->start += duration;
+}
+
+/* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
+ * active pad changed. */
+static gboolean
+gst_input_selector_set_active_pad (GstInputSelector * self,
+ GstPad * pad, gint64 stop_time, gint64 start_time)
+{
+ GstSelectorPad *old, *new;
+ GstPad **active_pad_p;
+
+ if (pad == self->active_sinkpad)
+ return FALSE;
+
+ old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
+ new = GST_SELECTOR_PAD_CAST (pad);
+
+ GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
+ GST_DEBUG_PAD_NAME (new));
+
+ if (stop_time == -1 && old) {
+ /* no stop time given, get the latest running_time on the active pad to
+ * close and open the new segment */
+ stop_time = start_time = gst_selector_pad_get_running_time (old);
+ GST_DEBUG_OBJECT (self, "using start/stop of %" G_GINT64_FORMAT,
+ start_time);
+ }
+
+ if (old && old->active && !self->pending_close && stop_time >= 0) {
+ /* schedule a last_stop update if one isn't already scheduled, and a
+ segment has been pushed before. */
+ memcpy (&self->segment, &old->segment, sizeof (self->segment));
+
+ GST_DEBUG_OBJECT (self, "setting stop_time to %" G_GINT64_FORMAT,
+ stop_time);
+ gst_segment_set_stop (&self->segment, stop_time);
+ self->pending_close = TRUE;
+ }
+
+ if (new && new->active && start_time >= 0) {
+ GST_DEBUG_OBJECT (self, "setting start_time to %" G_GINT64_FORMAT,
+ start_time);
+ /* schedule a new segment push */
+ gst_segment_set_start (&new->segment, start_time);
+ new->segment_pending = TRUE;
+ }
+
+ active_pad_p = &self->active_sinkpad;
+ gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
+ GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
+ self->active_sinkpad);
+
+ return TRUE;
+}
+
+static void
+gst_input_selector_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstInputSelector *sel = GST_INPUT_SELECTOR (object);
+
+ switch (prop_id) {
+ case PROP_ACTIVE_PAD:
+ {
+ GstPad *pad;
+
+ pad = g_value_get_object (value);
+
+ GST_INPUT_SELECTOR_LOCK (sel);
+ gst_input_selector_set_active_pad (sel, pad,
+ GST_CLOCK_TIME_NONE, GST_CLOCK_TIME_NONE);
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+ break;
+ }
+ case PROP_SELECT_ALL:
+ GST_INPUT_SELECTOR_LOCK (object);
+ sel->select_all = g_value_get_boolean (value);
+ GST_INPUT_SELECTOR_UNLOCK (object);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_input_selector_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstInputSelector *sel = GST_INPUT_SELECTOR (object);
+
+ switch (prop_id) {
+ case PROP_N_PADS:
+ GST_INPUT_SELECTOR_LOCK (object);
+ g_value_set_uint (value, sel->n_pads);
+ GST_INPUT_SELECTOR_UNLOCK (object);
+ break;
+ case PROP_ACTIVE_PAD:
+ GST_INPUT_SELECTOR_LOCK (object);
+ g_value_set_object (value, sel->active_sinkpad);
+ GST_INPUT_SELECTOR_UNLOCK (object);
+ break;
+ case PROP_SELECT_ALL:
+ GST_INPUT_SELECTOR_LOCK (object);
+ g_value_set_boolean (value, sel->select_all);
+ GST_INPUT_SELECTOR_UNLOCK (object);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static GstPad *
+gst_input_selector_get_linked_pad (GstPad * pad, gboolean strict)
+{
+ GstInputSelector *sel;
+ GstPad *otherpad = NULL;
+
+ sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
+
+ GST_INPUT_SELECTOR_LOCK (sel);
+ if (pad == sel->srcpad)
+ otherpad = sel->active_sinkpad;
+ else if (pad == sel->active_sinkpad || !strict)
+ otherpad = sel->srcpad;
+ if (otherpad)
+ gst_object_ref (otherpad);
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+
+ gst_object_unref (sel);
+
+ return otherpad;
+}
+
+static gboolean
+gst_input_selector_event (GstPad * pad, GstEvent * event)
+{
+ gboolean res = FALSE;
+ GstPad *otherpad;
+
+ otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
+
+ if (otherpad) {
+ res = gst_pad_push_event (otherpad, event);
+
+ gst_object_unref (otherpad);
+ } else
+ gst_event_unref (event);
+ return res;
+}
+
+/* query on the srcpad. We override this function because by default it will
+ * only forward the query to one random sinkpad */
+static gboolean
+gst_input_selector_query (GstPad * pad, GstQuery * query)
+{
+ gboolean res = TRUE;
+ GstInputSelector *sel;
+ GstPad *otherpad;
+
+ sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
+
+ otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_LATENCY:
+ {
+ GList *walk;
+ GstClockTime resmin, resmax;
+ gboolean reslive;
+
+ resmin = 0;
+ resmax = -1;
+ reslive = FALSE;
+
+ /* assume FALSE, we become TRUE if one query succeeds */
+ res = FALSE;
+
+ /* perform the query on all sinkpads and combine the results. We take the
+ * max of min and the min of max for the result latency. */
+ GST_INPUT_SELECTOR_LOCK (sel);
+ for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
+ walk = g_list_next (walk)) {
+ GstPad *sinkpad = GST_PAD_CAST (walk->data);
+
+ if (gst_pad_peer_query (sinkpad, query)) {
+ GstClockTime min, max;
+ gboolean live;
+
+ /* one query succeeded, we succeed too */
+ res = TRUE;
+
+ gst_query_parse_latency (query, &live, &min, &max);
+
+ GST_DEBUG_OBJECT (sinkpad,
+ "peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
+ ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
+
+ if (live) {
+ if (min > resmin)
+ resmin = min;
+ if (resmax == -1)
+ resmax = max;
+ else if (max < resmax)
+ resmax = max;
+ if (reslive == FALSE)
+ reslive = live;
+ }
+ }
+ }
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+ if (res) {
+ gst_query_set_latency (query, reslive, resmin, resmax);
+
+ GST_DEBUG_OBJECT (sel,
+ "total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
+ ", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
+ reslive);
+ }
+
+ break;
+ }
+ default:
+ if (otherpad)
+ res = gst_pad_peer_query (otherpad, query);
+ break;
+ }
+ if (otherpad)
+ gst_object_unref (otherpad);
+ gst_object_unref (sel);
+
+ return res;
+}
+
+static GstCaps *
+gst_input_selector_getcaps (GstPad * pad)
+{
+ GstPad *otherpad;
+ GstObject *parent;
+ GstCaps *caps;
+
+ parent = gst_object_get_parent (GST_OBJECT (pad));
+
+ otherpad = gst_input_selector_get_linked_pad (pad, FALSE);
+
+ if (!otherpad) {
+ if (GST_INPUT_SELECTOR (parent)->select_all) {
+ GST_DEBUG_OBJECT (parent,
+ "Pad %s:%s not linked, returning merge of caps",
+ GST_DEBUG_PAD_NAME (pad));
+ caps = gst_pad_proxy_getcaps (pad);
+ } else {
+ GST_DEBUG_OBJECT (parent,
+ "Pad %s:%s not linked, returning ANY", GST_DEBUG_PAD_NAME (pad));
+ caps = gst_caps_new_any ();
+ }
+ } else {
+ GST_DEBUG_OBJECT (parent,
+ "Pad %s:%s is linked (to %s:%s), returning peer caps",
+ GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (otherpad));
+ /* if the peer has caps, use those. If the pad is not linked, this function
+ * returns NULL and we return ANY */
+ if (!(caps = gst_pad_peer_get_caps (otherpad)))
+ caps = gst_caps_new_any ();
+ gst_object_unref (otherpad);
+ }
+
+ gst_object_unref (parent);
+ return caps;
+}
+
+/* check if the pad is the active sinkpad */
+static gboolean
+gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
+{
+ GstSelectorPad *selpad;
+ gboolean res;
+
+ selpad = GST_SELECTOR_PAD_CAST (pad);
+
+ GST_INPUT_SELECTOR_LOCK (sel);
+ res = (pad == sel->active_sinkpad);
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+
+ return res;
+}
+
+/* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
+static GstPad *
+gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
+{
+ GstPad *active_sinkpad;
+ GstSelectorPad *selpad;
+
+ selpad = GST_SELECTOR_PAD_CAST (pad);
+
+ selpad->active = TRUE;
+ active_sinkpad = sel->active_sinkpad;
+ if (active_sinkpad == NULL || sel->select_all) {
+ /* first pad we get activity on becomes the activated pad by default, if we
+ * select all, we also remember the last used pad. */
+ if (sel->active_sinkpad)
+ gst_object_unref (sel->active_sinkpad);
+ active_sinkpad = sel->active_sinkpad = gst_object_ref (pad);
+ GST_DEBUG_OBJECT (sel, "Activating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+ }
+
+ return active_sinkpad;
+}
+
+static GstPad *
+gst_input_selector_request_new_pad (GstElement * element,
+ GstPadTemplate * templ, const gchar * unused)
+{
+ GstInputSelector *sel;
+ gchar *name = NULL;
+ GstPad *sinkpad = NULL;
+
+ g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
+
+ sel = GST_INPUT_SELECTOR (element);
+
+ GST_INPUT_SELECTOR_LOCK (sel);
+
+ GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
+ name = g_strdup_printf ("sink%d", sel->padcount++);
+ sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
+ "name", name, "direction", templ->direction, "template", templ, NULL);
+ g_free (name);
+
+ sel->n_pads++;
+
+ gst_pad_set_event_function (sinkpad,
+ GST_DEBUG_FUNCPTR (gst_selector_pad_event));
+ gst_pad_set_getcaps_function (sinkpad,
+ GST_DEBUG_FUNCPTR (gst_selector_pad_getcaps));
+ gst_pad_set_chain_function (sinkpad,
+ GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
+ gst_pad_set_internal_link_function (sinkpad,
+ GST_DEBUG_FUNCPTR (gst_selector_pad_get_linked_pads));
+ gst_pad_set_bufferalloc_function (sinkpad,
+ GST_DEBUG_FUNCPTR (gst_selector_pad_bufferalloc));
+
+ gst_pad_set_active (sinkpad, TRUE);
+ gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+
+ return sinkpad;
+}
+
+static void
+gst_input_selector_release_pad (GstElement * element, GstPad * pad)
+{
+ GstInputSelector *sel;
+
+ sel = GST_INPUT_SELECTOR (element);
+ GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+
+ GST_INPUT_SELECTOR_LOCK (sel);
+ /* if the pad was the active pad, makes us select a new one */
+ if (sel->active_sinkpad == pad) {
+ GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+ gst_object_unref (sel->active_sinkpad);
+ sel->active_sinkpad = NULL;
+ }
+ sel->n_pads--;
+
+ gst_pad_set_active (pad, FALSE);
+ gst_element_remove_pad (GST_ELEMENT (sel), pad);
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+}
+
+static void
+gst_input_selector_reset (GstInputSelector * sel)
+{
+ GList *walk;
+
+ GST_INPUT_SELECTOR_LOCK (sel);
+ /* clear active pad */
+ if (sel->active_sinkpad) {
+ gst_object_unref (sel->active_sinkpad);
+ sel->active_sinkpad = NULL;
+ }
+ /* reset segment */
+ gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
+ sel->pending_close = FALSE;
+ /* reset each of our sinkpads state */
+ for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
+ GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
+
+ gst_selector_pad_reset (selpad);
+
+ if (selpad->tags) {
+ gst_tag_list_free (selpad->tags);
+ selpad->tags = NULL;
+ }
+ }
+ GST_INPUT_SELECTOR_UNLOCK (sel);
+}
+
+static GstStateChangeReturn
+gst_input_selector_change_state (GstElement * element,
+ GstStateChange transition)
+{
+ GstInputSelector *self = GST_INPUT_SELECTOR (element);
+ GstStateChangeReturn result;
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ GST_INPUT_SELECTOR_LOCK (self);
+ self->blocked = FALSE;
+ self->flushing = FALSE;
+ GST_INPUT_SELECTOR_UNLOCK (self);
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ /* first unlock before we call the parent state change function, which
+ * tries to acquire the stream lock when going to ready. */
+ GST_INPUT_SELECTOR_LOCK (self);
+ self->blocked = FALSE;
+ self->flushing = TRUE;
+ GST_INPUT_SELECTOR_BROADCAST (self);
+ GST_INPUT_SELECTOR_UNLOCK (self);
+ break;
+ default:
+ break;
+ }
+
+ result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ gst_input_selector_reset (self);
+ break;
+ default:
+ break;
+ }
+
+ return result;
+}
+
+static gint64
+gst_input_selector_block (GstInputSelector * self)
+{
+ gint64 ret = 0;
+ GstSelectorPad *spad;
+
+ GST_INPUT_SELECTOR_LOCK (self);
+
+ if (self->blocked)
+ GST_WARNING_OBJECT (self, "switch already blocked");
+
+ self->blocked = TRUE;
+ spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
+
+ if (spad)
+ ret = gst_selector_pad_get_running_time (spad);
+ else
+ GST_DEBUG_OBJECT (self, "no active pad while blocking");
+
+ GST_INPUT_SELECTOR_UNLOCK (self);
+
+ return ret;
+}
+
+/* stop_time and start_time are running times */
+static void
+gst_input_selector_switch (GstInputSelector * self, GstPad * pad,
+ gint64 stop_time, gint64 start_time)
+{
+ gboolean changed;
+
+ g_return_if_fail (self->blocked == TRUE);
+
+ GST_INPUT_SELECTOR_LOCK (self);
+ changed =
+ gst_input_selector_set_active_pad (self, pad, stop_time, start_time);
+
+ self->blocked = FALSE;
+ GST_INPUT_SELECTOR_BROADCAST (self);
+ GST_INPUT_SELECTOR_UNLOCK (self);
+
+ if (changed)
+ g_object_notify (G_OBJECT (self), "active-pad");
+}
+
+static gboolean
+gst_input_selector_check_eos (GstElement * selector)
+{
+ GstIterator *it = gst_element_iterate_sink_pads (selector);
+ GstIteratorResult ires;
+ gpointer item;
+ gboolean done = FALSE, is_eos = FALSE;
+ GstSelectorPad *pad;
+
+ while (!done) {
+ ires = gst_iterator_next (it, &item);
+ switch (ires) {
+ case GST_ITERATOR_DONE:
+ GST_INFO_OBJECT (selector, "all sink pads have eos");
+ done = TRUE;
+ is_eos = TRUE;
+ break;
+ case GST_ITERATOR_OK:
+ pad = GST_SELECTOR_PAD_CAST (item);
+ if (!pad->eos) {
+ done = TRUE;
+ }
+ gst_object_unref (pad);
+ break;
+ case GST_ITERATOR_RESYNC:
+ gst_iterator_resync (it);
+ break;
+ default:
+ done = TRUE;
+ break;
+ }
+ }
+ gst_iterator_free (it);
+
+ return is_eos;
+}